Jessie James Grelle is an American voice actor and ADR script writer known for their extensive work in English-language dubs of Japanese anime. They began their career in the voice-over community in 2004 in Houston, Texas, at ADV Films and have since worked for numerous studios, including Funimation, Crunchyroll, Sony Pictures, and Warner Bros. Over a career spanning more than two decades, they have been involved in over 400 individual titles across anime, animation, and video games.

Grelle is recognized for voicing a wide array of leading characters, particularly in the harem and fantasy genres. One of their most prominent roles is Armin Arlert in the massively popular series Attack on Titan. They also voice Fumikage Tokoyami in My Hero Academia and Nobuchika Ginoza in Psycho-Pass. In the sports anime genre, they are known for the roles of Yuri Katsuki in Yuri on Ice!!! and Satori Tendo in Haikyu!!.

As specified by the user, Grelle voices Kinro in the Dr. Stone franchise, including the New World and Science Future arcs, and Sadao Maō, also known as the Demon King Satan, in The Devil Is a Part-Timer!!. Other significant roles include Shido Itsuka in the Date A Live series, Futaro Uesugi in The Quintessential Quintuplets, Byakuya Togami in Danganronpa, and Issei Hyodo in High School DxD. They have also lent their voice to characters in video games, such as Ludger Kresnik in Tales of Xillia 2 and Demigra in the Dragon Ball Xenoverse series.

Beyond anime, Grelle has voiced Tyrian Callows in the original animated series RWBY. In addition to performing, they have also worked as an ADR script writer, contributing to the adaptation of anime for English-speaking audiences.